Cosmo COS-30IRHP Lumin 30 in Insert
#3 in InsertsFull review
A simple 30 in insert for a custom hood shell, with baffle filters and right-sized airflow.
Amazon $252.99$252.99
The Cosmo COS-30IRHP Lumin 30 in Insert is the better range hood overall, rated 3.5 to 2.7. The Cosmo COS-30IRHP Lumin 30 in Insert leads on quiet at low speed, airflow and features. The Broan-NuTone PM300SS 21 in Insert wins on price. The Broan-NuTone PM300SS 21 in Insert costs $63.43 less ($189.56 vs $252.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Broan-NuTone PM300SS 21 in Insert
#5 in InsertsFull review
A small, inexpensive power pack for a custom hood over a standard range. Basic, but a trusted brand.
Amazon $189.56$189.56
Which should you buy?
- Choose the Cosmo COS-30IRHP Lumin 30 in Insert for quiet at low speed (45 dB vs 3 sones (about 56 dB)), airflow (380 CFM vs 300 CFM) and features (dishwasher-safe steel filters, LED lighting, 3 or more speeds vs LED lighting, converts to ductless).
- Choose the Broan-NuTone PM300SS 21 in Insert for price ($189.56 vs $252.99).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every inserts range hood; a clear win is highlighted. How we rank explains each one.
| Factor weight | Cosmo COS-30IRHP Lumin 30 in Insert | Broan-NuTone PM300SS 21 in Insert |
|---|---|---|
| Overall rating | 3.5/5 | 2.7/5 |
| Airflow 20% | 92 380 CFM | 60 300 CFM |
| Quiet at full speed 20% | 50 noise at full speed not published (neutral score used) | 35 7 sones (about 68 dB) |
| Quiet at low speed 15% | 50 45 dB | 0 3 sones (about 56 dB) |
| Features 20% | 45 dishwasher-safe steel filters, LED lighting, 3 or more speeds | 25 LED lighting, converts to ductless |
| Price 15% | 60 $252.99 | 72 $189.56 |
| Warranty 10% | 25 2-year warranty | 0 1-year warranty |
Specifications
| Cosmo COS-30IRHP Lumin 30 in Insert | Broan-NuTone PM300SS 21 in Insert | |
|---|---|---|
| Airflow and noise | ||
| Max airflow | 380 CFM | 300 CFM |
| HVI-certified airflow (0.1 in.) | - | 260 CFM |
| Noise at max speed | - | 7 sones |
| Noise at low speed | 45 dB | 3 sones |
| Fan speeds | 3 | 2 |
| Installation | ||
| Mount | Insert | Insert |
| Width | 30 in | 21 in |
| Venting | Ducted only | Ducted or ductless |
| Duct connection | 5.9 in round | 7 in round |
| Power | Plug-in | - |
| Airflow cap for make-up air codes | No | No |
| Features | ||
| Grease filters | Steel baffle | Aluminum mesh |
| LED lighting | Yes | Yes |
| Controls | Push button | Rocker |
| Delayed shut-off | No | No |
| Automatic fan speed | No | No |
| Build | ||
| Weight | 15.9 lb | 7.2 lb |
| Warranty | 2 years | 1 year |